package com.lanjing.common.redis.configure;

import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONReader;
import com.alibaba.fastjson2.JSONWriter;
import com.alibaba.fastjson2.filter.Filter;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

/**
 * 内容摘要:Redis使用FastJson序列化
 *
 * @author: zyt
 * @date 2024-01-16 11:01
 */
@Slf4j
public class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T> {
    public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

    // 按需加上需要支持自动类型的类名前缀，范围越小越安全
    static final Filter AUTO_TYPE_FILTER = JSONReader.autoTypeFilter("com.lanjing");

    private Class<T> clazz;

    public FastJson2JsonRedisSerializer(Class<T> clazz)
    {
        super();
        this.clazz = clazz;
    }

    @Override
    public byte[] serialize(T t) throws SerializationException
    {
        if (t == null)
        {
            return new byte[0];
        }
        try {
            return JSON.toJSONString(t, JSONWriter.Feature.WriteClassName).getBytes(DEFAULT_CHARSET);
        } catch (Exception e){
            log.error("Fastjson2 序列化错误：{}", e.getMessage());
            throw new SerializationException("无法序列化：" + e.getMessage(), e);
        }

    }

    @Override
    public T deserialize(byte[] bytes) throws SerializationException
    {
        if (bytes == null || bytes.length <= 0)
        {
            return null;
        }
        try {
            String str = new String(bytes, DEFAULT_CHARSET);
            return JSON.parseObject(str, clazz, AUTO_TYPE_FILTER);
        } catch (Exception e){
            log.error("Fastjson2 序列化错误：{}", e.getMessage());
            throw new SerializationException("无法序列化：" + e.getMessage(), e);
        }

    }
}
